/* ========== 招商证券 - 蓝白专业主题 ========== */
:root {
    --primary: #003d99;
    --primary-dark: #002a6e;
    --primary-light: #0066cc;
    --accent: #0066cc;
    --accent-light: #3399ff;
    --bg-deep: #f2f5fa;
    --bg-dark: #f7f9fc;
    --bg-card: #ffffff;
    --bg-card-hover: #ffffff;
    --border: #dce3ed;
    --text-primary: #19273b;
    --text-secondary: #5c6d84;
    --text-muted: #8b9ab0;
    --gradient-hero: linear-gradient(135deg, #eaf1fb 0%, #f5f8fd 50%, #eef3fa 100%);
    --gradient-card: linear-gradient(180deg, #ffffff 0%, #f8fafd 100%);
    --gradient-accent: linear-gradient(135deg, #003d99 0%, #0066cc 50%, #3399ff 100%);
    --gradient-btn: linear-gradient(135deg, #003d99 0%, #0066cc 100%);
    --shadow-card: 0 4px 24px rgba(0,61,153,.08);
    --shadow-glow: 0 0 40px rgba(0,61,153,.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Consolas', monospace;
    --transition: all .3s cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:var(--font-sans);
    background:var(--bg-deep);
    color:var(--text-primary);
    line-height:1.7;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
}

/* ========== 数据流背景 ========== */
.data-stream{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:hidden}
.data-line{
    position:absolute;width:1px;
    background:linear-gradient(180deg,transparent,rgba(0,102,204,.06),transparent);
    animation:dataFlow linear infinite;
}
@keyframes dataFlow{
    0%{transform:translateY(-100%);opacity:0}
    10%{opacity:1}
    90%{opacity:1}
    100%{transform:translateY(100vh);opacity:0}
}

/* ========== 导航 ========== */
.nav{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    padding:0 40px;height:70px;
    display:flex;align-items:center;justify-content:space-between;
    transition:var(--transition);background:rgba(255,255,255,.88);
}
.nav.scrolled{
    background:rgba(255,255,255,.95);
    backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);
    box-shadow:0 4px 30px rgba(0,0,0,.06);
}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-logo-icon{
    width:38px;height:38px;
    background:var(--gradient-accent);
    border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    font-size:18px;font-weight:900;color:#fff;
}
.nav-logo-text{font-size:18px;font-weight:700;color:var(--text-primary);letter-spacing:1px}
.nav-logo-text span{color:var(--accent)}
.nav-cta{
    padding:10px 24px;
    background:var(--gradient-btn);
    border:none;border-radius:50px;
    color:#fff;font-size:14px;font-weight:600;
    cursor:pointer;transition:var(--transition);letter-spacing:.5px;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,102,204,.35)}

/* ========== Hero ========== */
.hero{
    position:relative;min-height:100vh;
    display:flex;align-items:center;justify-content:center;
    text-align:center;padding:120px 40px 80px;overflow:hidden;
}
.hero::before{
    content:'';position:absolute;
    top:50%;left:50%;
    width:800px;height:800px;
    background:radial-gradient(circle,rgba(0,102,204,.04) 0%,transparent 70%);
    transform:translate(-50%,-50%);
}
.hero-content{position:relative;z-index:1;max-width:800px}
.hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 18px;
    background:rgba(0,102,204,.08);
    border:1px solid rgba(0,102,204,.15);
    border-radius:50px;
    font-size:13px;color:var(--primary-light);
    margin-bottom:28px;letter-spacing:2px;
}
.hero-badge::before{
    content:'';width:8px;height:8px;
    background:var(--accent);
    border-radius:50%;
    animation:pulse 2s infinite;
}
@keyframes pulse{
    0%,100%{box-shadow:0 0 0 0 rgba(0,102,204,.3)}
    50%{box-shadow:0 0 0 12px rgba(0,102,204,0)}
}
.hero h1{font-size:clamp(36px,5vw,52px);font-weight:800;line-height:1.25;margin-bottom:20px;letter-spacing:1px}
.hero h1 .highlight{
    background:var(--gradient-accent);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero-desc{font-size:17px;color:var(--text-secondary);margin-bottom:40px;line-height:1.8}
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{
    padding:14px 40px;
    background:var(--gradient-btn);
    border:none;border-radius:50px;
    color:#fff;font-size:16px;font-weight:600;
    cursor:pointer;transition:var(--transition);
    text-decoration:none;
    display:inline-flex;align-items:center;gap:8px;letter-spacing:.5px;
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 35px rgba(0,102,204,.35)}
.btn-outline{
    padding:14px 40px;background:transparent;
    border:1.5px solid var(--border);border-radius:50px;
    color:var(--text-primary);font-size:16px;font-weight:600;
    cursor:pointer;transition:var(--transition);text-decoration:none;
}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(0,102,204,.04)}
.hero-stats{display:flex;gap:48px;justify-content:center;margin-top:56px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat-num{font-size:36px;font-weight:800;color:var(--accent);font-family:var(--font-mono)}
.hero-stat-label{font-size:13px;color:var(--text-muted);margin-top:4px}

/* ========== 特点 ========== */
.section{padding:100px 40px;position:relative;z-index:1}
.section-header{text-align:center;margin-bottom:60px}
.section-label{font-size:13px;color:var(--accent);letter-spacing:3px;text-transform:uppercase;margin-bottom:12px}
.section-title{font-size:36px;font-weight:700;margin-bottom:14px}
.section-sub{font-size:16px;color:var(--text-secondary);max-width:600px;margin:0 auto}
.container{max-width:1200px;margin:0 auto}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
    background:var(--gradient-card);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:36px 28px;
    transition:var(--transition);
    position:relative;overflow:hidden;
    box-shadow:0 2px 12px rgba(0,0,0,.03);
}
.feature-card::before{
    content:'';position:absolute;
    top:0;left:0;right:0;height:3px;
    background:var(--gradient-accent);
    transform:scaleX(0);transition:transform .4s ease;
}
.feature-card:hover::before{transform:scaleX(1)}
.feature-card:hover{border-color:rgba(0,102,204,.2);transform:translateY(-4px);box-shadow:0 8px 36px rgba(0,61,153,.08)}
.feature-icon{
    width:52px;height:52px;
    background:rgba(0,102,204,.06);
    border-radius:var(--radius-md);
    display:flex;align-items:center;justify-content:center;
    font-size:24px;margin-bottom:20px;
}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* ========== 下载区 ========== */
.download-section{background:var(--bg-dark)}
.download-card{
    background:var(--gradient-card);border:1px solid var(--border);
    border-radius:var(--radius-xl);padding:48px;
    display:flex;align-items:center;gap:48px;
    position:relative;overflow:hidden;box-shadow:0 2px 16px rgba(0,0,0,.03);
}
.download-card::after{
    content:'';position:absolute;top:-50%;right:-10%;
    width:400px;height:400px;
    background:radial-gradient(circle,rgba(0,102,204,.03) 0%,transparent 70%);
}
.download-info{flex:1;position:relative;z-index:1}
.download-info h3{font-size:28px;margin-bottom:12px}
.download-info p{color:var(--text-secondary);margin-bottom:24px}
.download-meta{display:flex;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.download-meta-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}
.download-meta-item span{color:var(--text-secondary);font-weight:600}
.download-qrcode{
    width:160px;height:160px;background:#fff;
    border-radius:var(--radius-lg);padding:8px;
    border:1px solid var(--border);
    position:relative;z-index:1;
    display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.download-qrcode canvas{width:100%;height:100%}

/* ========== FAQ ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
    background:var(--gradient-card);border:1px solid var(--border);
    border-radius:var(--radius-md);margin-bottom:12px;
    overflow:hidden;transition:var(--transition);
}
.faq-item.active{border-color:rgba(0,102,204,.25)}
.faq-question{
    padding:20px 24px;cursor:pointer;
    display:flex;justify-content:space-between;align-items:center;
    font-weight:600;font-size:15px;user-select:none;
}
.faq-arrow{transition:transform .3s ease;color:var(--text-muted);font-size:18px}
.faq-item.active .faq-arrow{transform:rotate(180deg);color:var(--accent)}
.faq-answer{
    max-height:0;overflow:hidden;
    transition:max-height .35s ease,padding .35s ease;
    padding:0 24px;color:var(--text-secondary);font-size:14px;line-height:1.8;
}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 20px}

/* ========== 底部 ========== */
.footer{
    background:#fff;border-top:1px solid var(--border);
    padding:40px;text-align:center;position:relative;z-index:1;
}
.footer p{font-size:13px;color:var(--text-muted)}
.footer a{color:var(--text-secondary);text-decoration:none}
.footer a:hover{color:var(--accent)}

/* ========== 404 ========== */
.notfound{
    min-height:100vh;display:flex;align-items:center;justify-content:center;
    text-align:center;padding:40px;background:#fff;
}
.notfound-code{
    font-size:140px;font-weight:900;
    background:var(--gradient-accent);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    line-height:1;margin-bottom:12px;
}
.notfound h2{font-size:24px;margin-bottom:12px}
.notfound p{color:var(--text-secondary);margin-bottom:32px}
.notfound .btn-primary{display:inline-flex;text-decoration:none}

/* ========== 响应式 ========== */
@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.download-card{flex-direction:column;text-align:center}}
@media(max-width:768px){
    .hero h1{font-size:32px}.hero-stats{gap:24px}
    .section{padding:60px 20px}.features-grid{grid-template-columns:1fr}
    .section-title{font-size:26px}.download-card{padding:28px}.nav{padding:0 20px}
}